Year	current US$
1976	10581542925.42043
1977	11014371895.294634
1978	13164495382.97931
1979	16410669759.33882
1980	16349149507.77394
1981	13671505560.142933
1982	14742453597.653574
1983	12538235317.756575
1984	12534329526.957981
1985	12530863086.96521
1986	15003637806.396057
1987	15120915984.68772
1988	18791092517.296898
1989	18362496260.59357
1990	22450193941.87596
1991	26753622970.622543
1992	28232693119.937786
1993	25462748119.977848
1994	28091947527.869816
1995	31081190829.0553
1996	31302344633.247444
1997	31215447839.957573
1999	24257002568.96803
2000	23614425911.984444
2001	25251796884.05928
2002	26083407105.703724
2003	36631001996.36678
2004	42222620024.638374
2005	38544150505.20283
2006	42015672060.74816
2007	40615874527.046646
2008	35948611637.94232
2009	19643006925.62654
2010	21897962954.05279
2011	13191219651.831514
2012	19005862883.17029
2013	25037881113.954105
2014	25464949678.30594
2015	20907260139.56028
2016	20415636845.652996
2017	19332563216.185184
2018	20612615615.03996
2019	20918508769.861507
2020	12579641199.08402
2021	21099069900.093796
2022	22280784091.530567
2023	27997856590.091717